gpld-limit-year-dropdown-options.php: Added snippet to limit date dropdown year options based on configured min/max.

gp-limit-dates/gpld-limit-year-dropdown-options.php

@@ -0,0 +1,98 @@
+<?php
+/**
+ * Gravity Perks // Limit Dates // Limit Year Dropdown Options
+ * https://gravitywiz.com/documentation/gravity-forms-limit-dates/
+ *
+ * Limits year dropdown options based on configured min/max dates in GP Limit Dates.
+ * Note: min/max rules that reference other date fields are not supported.
+ */
+
+class GPLD_Limit_Year_Dropdown {
+	protected $form_id;
+	protected $field_id;
+
+	public function __construct( $args = array() ) {
+		$args = array_merge(
+			array(
+				'form_id'  => null,
+				'field_id' => null,
+			),
+			$args
+		);
+
+		$this->form_id  = $args['form_id'];
+		$this->field_id = $args['field_id'];
+
+		add_filter( 'gform_date_min_year', array( $this, 'filter_min_year' ), 10, 3 );
+		add_filter( 'gform_date_max_year', array( $this, 'filter_max_year' ), 10, 3 );
+	}
+
+	public function filter_min_year( $min_year, $form, $field ) {
+		return $this->filter_year( 'min', $min_year, $form, $field );
+	}
+
+	public function filter_max_year( $max_year, $form, $field ) {
+		return $this->filter_year( 'max', $max_year, $form, $field );
+	}
+
+	protected function filter_year( $type, $default_year, $form, $field ) {
+		if ( ! $this->is_applicable( $form, $field ) ) {
+			return $default_year;
+		}
+
+		$options = gp_limit_dates()->get_limit_dates_field_options( $field );
+		$date_key = $type . 'Date';
+		$mod_key = $type . 'DateMod';
+
+		if ( empty( $options[ $date_key ] ) ) {
+			return $default_year;
+		}
+
+		$date_value = $options[ $date_key ];
+		$modifier = rgar( $options, $mod_key );
+
+		if ( $date_value == '{today}' ) {
+			$timestamp = strtotime( 'today midnight' );
+		} elseif ( is_numeric( $date_value ) && $date_value > 0 ) {
+			return $default_year;
+		} else {
+			$timestamp = strtotime( $date_value );
+		}
+
+		if ( $timestamp && ! empty( $modifier ) ) {
+			$timestamp = strtotime( $modifier, $timestamp );
+		}
+
+		if ( $timestamp ) {
+			$calculated_year = date( 'Y', $timestamp );
+			return $type === 'min' ? max( $calculated_year, $default_year ) : min( $calculated_year, $default_year );
+		}
+
+		return $default_year;
+	}
+
+	protected function is_applicable( $form, $field ) {
+		if ( ! function_exists( 'gp_limit_dates' ) || $field->dateType !== 'datedropdown' ) {
+			return false;
+		}
+
+		$form_id = rgar( $form, 'id' );
+
+		if ( null !== $this->form_id && intval( $this->form_id ) !== intval( $form_id ) ) {
+			return false;
+		}
+
+		if ( null !== $this->field_id && intval( $this->field_id ) !== intval( $field->id ) ) {
+			return false;
+		}
+
+		return true;
+	}
+}
+
+# Configuration
+
+new GPLD_Limit_Year_Dropdown(array(
+	'form_id'  => 123,
+	'field_id' => 4,
+));